[CXF-5500] Limit what get's logged from the conduit with FINE logging

git-svn-id: https://svn.apache.org/repos/asf/cxf/trunk@1559171 13f79535-47bb-0310-9956-ffa450edef68
[CXF-5498] Put a DOM level3 check around DOM level 3 API call

git-svn-id: https://svn.apache.org/repos/asf/cxf/trunk@1559172 13f79535-47bb-0310-9956-ffa450edef68
[CXF-5493] DOMUtils isn't handling CDATASections when grabbing text content

git-svn-id: https://svn.apache.org/repos/asf/cxf/trunk@1559173 13f79535-47bb-0310-9956-ffa450edef68